Conventional FMCW radar systems operate across

coarse Doppler and range bins to estimate target parameters,

which can be inaccurate for targets with similar range-Doppler-

azimuth signatures. Leveraging the sparsity of beat signals in the

time-frequency-beamspace representation of the measurement

data, we present a sequential algorithm for jointly estimating

the polynomial coefficients and azimuth directions of multiple

beat signals.